My understanding of how RO's work is limited but I had an idea last night and wondered if anyone knows the likelihood of it working.
(It is completely theoretical, ignore the obvious things like "why bother? Use resin", "would be a faff", "would take longer")
If my RO reduced tap water from 350+ ppm down to around 10ppm or less. Could that product water be stored in IBC, then pumped back through RO (with enough pressure) bringing it down to 1 / 2 ppm?.
As the initial TDS of the product water is only 10ppm, could the RO be run with a much lower waste ratio, say 10/90 or 20/80?
Or would the 10ppm contain only dissolved solids that are too fine for the membrane to catch?
Just wondering what options I'd have if a resin shortage comes and I get stuck without any. (I know apparently 10ppm could be used, but closer to 0 ppm less worries)
(It is completely theoretical, ignore the obvious things like "why bother? Use resin", "would be a faff", "would take longer")
If my RO reduced tap water from 350+ ppm down to around 10ppm or less. Could that product water be stored in IBC, then pumped back through RO (with enough pressure) bringing it down to 1 / 2 ppm?.
As the initial TDS of the product water is only 10ppm, could the RO be run with a much lower waste ratio, say 10/90 or 20/80?
Or would the 10ppm contain only dissolved solids that are too fine for the membrane to catch?
Just wondering what options I'd have if a resin shortage comes and I get stuck without any. (I know apparently 10ppm could be used, but closer to 0 ppm less worries)